77.—Whenever a local authority on account of or for the purpose of an alteration to a road or bridge—

(a) requires an authorised undertaker or a holder of an authorisation under section 16 of the Electricity Regulation Act 1999, or the holder of a direct line permission under section 37 of the Electricity Regulation Act 1999, to alter the position or depth of underground electrical wires, mains, or other electrical works or the position of poles or other structures carrying electrical wires or mains or other above ground electrical works, or

(b) requires the Board to alter the position or depth of any such underground electrical works or the position of any such above ground electrical works as aforesaid belonging to or under the control of the Board,

the expenses incurred by such authorised undertaker or holder of an authorisation under section 16 of the Electricity Regulation Act 1999, or holder of a direct line permission under section 37 of the Electricity Regulation Act 1999, or by the Board, as the case may be, in complying with such requisition shall be paid to such authorised undertaker or holder of an authorisation under section 16 of the Electricity Regulation Act 1999, or holder of a direct line permission under section 37 of the Electricity Regulation Act 1999, or to the Board, as the case may require, by such local authority or, demand as part of the expenses of the maintenance of such road or bridge and the amount of such expenses so to be paid to such authorised undertaker or holder of an authorisation under section 16 of the Electricity Regulation Act 1999, or holder of a direct line permission under section 37 of the Electricity Regulation Act 1999, or to the Board shall be fixed by an arbitrator appointed by the Commission for Electricity Regulation established under section 8 of the Electricity Regulation Act 1999.]